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String2Array

/*
    Copyright (C) 2011, Stephane Bisaro, aka iri <iri@irizone.net>

    License : you can do what you want with this source code
    This code is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
    KIND, either express or implied.
*/

/*
    Transform a string to an array

    setArray : fun [S] I
        initialize the array from a string. Return always 0.

    changeArray : fun [I S] I
        replace the value of the index. Return always 0.

    addArray : fun [S] I
        add a char at the end if there is a still space.
        Returns 0 if ok, 1 if there is not place enough, 2 if the length
        of input is too large (must be one char)

    removeArray : fun [I] I
        remove the content of the given index. The content of the
        superior index is decreased. Return 0 if ok, 1 if the index
        is out of range.

    getArrayValue : fun [I] S
        return the char from the given index

    getArray : fun [] S
        retrieve a string from the array

    Note : you can define the array with a max size instead the length of 
    the input. In this case, don't forget to change tests in functions ...
*/

var input = "Scol is a bbeautiful language ";;
typeof array = tab S;;

/* Private functions */
fun getArray2 (counter)=
    if counter >= sizetab array then
        nil
    else
        strcat array.counter getArray2 counter+1;;

fun addArray2 (array, char, previous, counter)=
    if counter < 0 then
        1
    else
        if array.counter == nil then
            addArray2 array char counter counter-1
        else if previous != nil then
        (
            set array.previous = char;
            0
        )
        else
            addArray2 array char previous counter-1;;

fun removeArray2 (array, index, counter)=
    if counter >= ((sizetab array) - 1) then
    (
        set array.counter = nil;
        0
    )
    else if counter >= index then
    (
        set array.counter = array.(counter+1);
        removeArray2 array index counter+1
    )
    else
        removeArray2 array index counter+1;;

fun setArray2 (string, counter)=
    if (!strcmp string "") then
        0
    else
        (
        set array.counter = substr string 0 1;
        setArray2 substr string 1 strlen string counter+1
        );;

/* Public functions */
fun getArray ()=
    getArray2 0;;

fun getArrayValue (index)=
    array.index;;

fun removeArray (index)=
    if index > sizetab array then
        1
    else
        removeArray2 array index 0;;

fun addArray (char)=
    if 1 == strlen char then
        let (sizetab array)-1 -> n in
        addArray2 array char nil n
    else
        2;;

fun changeArray (index, char)=
    set array.index = char;
    0;;

fun setArray (string)=
    set array = mktab strlen string "";
    setArray2 string 0;;

/* Main function */    
fun main ()=
    _showconsole;

    _fooS input;
    _fooId setArray input;
    _fooS getArrayValue 12;
    _fooId changeArray 2 "O";
    _fooId removeArray 10;
    _fooId addArray "!";
    _fooS getArray;
    0;;

Author : iri
Date : december 2011

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